Vacuum pump unit in the front and pre-pumped configuration

Vacuum pump unit in the front and pre-pumping choice is very important, the wrong choice will affect the entire work process, and even cause great economic losses.

With forepump

Forepump directly affect the performance of the main pump, pumping time and economic impact of the vacuum system. The gas in the vacuum system is in the steady state flow, the arbitrary section of the pipeline the entire gas flow is equal. Therefore, a series of pipeline pumps in unit time is equal to the pumped gas. However, the pressure of each section of the pipeline system is not equal, each section of the pumping speed is also not the same. Therefore, with the requirements before the pump is

② Lower than the maximum pressure of the main pump discharge pressure caused in the main pump outlet

③ If the pre-pump doubles as a pre-pumping, but also to meet the pre-pre-vacuum pumping time and degree requirements.

With pre-pumped

Some of the main pump, such as titanium pumps and cryogenic pumps and the like, you only need to be able to get ready pre-pumped vacuum, and then work independently on their own, without the need to pre-stage pump. Such pre-pumping system pumping speed, is within the vacuum chamber (typically 10 ~ 15min) time required for the pre-pumped vacuum degree of speed.

Other main pump, such as diffusion pump and booster pump, they need both before the pump, but also need to pre-pumped. At this point, you can compare the two pumping speed, if pre-drainage pumping speed of not more than pre-pumping speed, the front-stage pump can cater PREPUMP. Otherwise, you need to set up a pre-pumped vacuum. This sets up a pre-set pumping pumping speed for the preceding two differential pumping.

What is the vacuum
Vacuum means that a given gas pressure within the space of less than the area of a standard atmospheric pressure gas state.
Vacuum is rarefied gas environment. Compared with the atmosphere it has a number of advantages, such as gas thin, less oxygen, clean environment...

Vacuum pump in a variety of different job categories effect have?
Vacuum pumps work in a variety of different play areas in effect summed up in the following areas:
1, main pump: the so-called main pump is a vacuum system is evacuated container is directly evacuated to the vacuum pump ...